San Diego Chargers' Junior Seau does a celebration dance after one of his seven tackles in the Chargers' 24-3 win over the Houston Texans on Sept. 15, 2002, in San Diego. Seau also had a sack in the game and finished his career with 56.5 of them. (AP Photo)

San Diego's Junior Seau signs an autograph for a Japanese fan after his team practice at the Tokyo Dome indoor stadium July 27, 1996. (AP Photo/Shizuo Kambayashi)

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Chargers mainstay

San Diego Chargers linebacker Junior Seau, seen here Nov. 8, 1998, played 20 years in the NFL after graduating from USC. (Albert Dickson/Sporting News)

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Miami days

Dolphins linebacker Junior Seau hangs his head on the bench late in the Dolphins' 22-0 loss to the Cleveland Browns on Nov. 20, 2005, in Cleveland. Seau played three seasons with the Dolphins before joining the Patriots. (AP Photo/Amy Sancetta)

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First retirement

Junior Seau speaks to fans and the media during a news conference announcing his retirement from pro football Aug. 14, 2006, at the Chargers' training facility in San Diego. Seau announced his retirement after 13 seasons with his hometown San Diego Chargers and three less-productive years with the Miami Dolphins, but later re-entered the league for four seasons with the New England Patriots. (AP Photo/Sandy Huffaker)

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Patriot years

New England Patriots linebacker Junior Seau reacts to a play during the AFC Championship football game in Foxborough, Mass. on Jan. 20, 2008. Seau played for the Patriots for four seasons before retiring for good. (AP Photo/Winslow Townson)

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Run to the Super Bowl

New England Patriots' Junior Seau holds the Lamar Hunt trophy after the Patriots beat the San Diego Chargers 21-12 to win the AFC Championship on Jan. 20, 2008, in Foxborough, Mass. The undefeated Patriots went on to be upset by the Giants in the Super Bowl. (AP Photo/Gene J. Puskar)

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Near miss

New England Patriots linebacker Junior Seau walks off the field as confetti falls after the New York Giants' 17-14 win in Super Bowl XLII on Feb. 3, 2008, in Glendale, Ariz. Seau would start just two more games over the next two seasons before retiring from the NFL for good. (AP Photo/Paul Sancya)

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Charger legend

Former San Diego Chargers great Junior Seau smiles during his induction into the Chargers Hall of Fame during a halftime ceremony of a Nov. 27, 2011, game in San Diego. (AP Photo/Denis Poroy)